Filter.



,-337. PATBNTED .TUNE Z3, 1.968.

J. G. & 0.' B. HETZMAN.

FILTER. AyPLIoATIoN FILEDAUG. 3.1905.

inventors Attorneys JEROME Gr.l HEITZMAN AND oTTo B. HEITZMAN, or FORT MADISON, IOWA.

rittens.

ToV all whom it may concern:

Be it known that we., JnnoMnG. Harra- MAN and OTTO B5 HEITZMAN, citizens of the United States, residing at Fort Madison, in the county of Lee and State of Iowa, have invented a new and useful Filter, of which the following is a specification.-

This invention has relation to filters and it consists in the novel construction and ar` rangement of its parts as hereinafter shown and described.

The object of the invention is to provide a filter adapted to beused in receptacles such as water coolers, etc.

The filter comprises but few parts and the said parts are so formed and arranged as to lend strength and durability to the structure and at the same time subject the contents of the filter to rapid and ready presentation to the surface of the filtering agent.`

With the above objects in view the filter consists primarily of a tank having at its up perend an exterior flan e which is adapted.

to rest upon the up er e ge of a water cooler or similar receptade while the body ortion of the tank is located in the interior t ereof. The bottom of the tank is concaved and is rovided with a number of perforations.

therwise the tank is iniperforated. The said tank is provided near itslower endl with an exterior annular flange u on the under side of which is seated a eXible gasket. The tank is provided with aneXterior thread located below said flange. ceives the lower end of the tank and is provided with a thread 'which engages the eXterior thread thereof. A cribriform disk is seated in the lower end-.of the cylinder and is spaced from the foraminous concavedbottom of the tank, said space forming a chamber in which may be placed sand, charcoal or other granular filtering niaterial.

The figure `inthe drawing is a vertical sec,- tional view of the filter applied -to a water cooler of usual construction.

The cooler or receptacle 1 is provided wit the usual faucet 2 and cover 3. The tank- 4 is' provided witha concaved bottom 5 which is rovided with a number of perforations.

Ot er than the perforations provided in the said concaved bottom 5 the tank 4 is imperforated. The upper edge of the tank is .formed into an annular flange 6 which rests upon the upper endvof thev 'cooler 1. LThe tank 4 is provided upon its' exterior and near;` its lower end vwith .an annular flange and the',

Speeieation of Letters Patent. Application mee. august s, 1905. serial No. 272,574

A cylinder re-- the disk 14.

screw thread 8 extends over the 'lsurfaceot une lower portion ofthe tank 4 below the flange 7 rammed mme 23. 190e.,

and the bottom of the tank. The cylinder i* 10 is provided with an internalv thread 11 'which engages the thread 8. A The upper nd of the said cylinder comes in contact with he gasket 12 which is seated against the under surface of the iiange 7. The lower end of the cylinder 10 is provided with an inwardly eX- tending annular flange 13 vupon which is seated a 'cribriform disk 14 which'is-held in place by cement 15 ori other plastic material inten'- posed between the edge ofthe disk 14'and the inner 'surfacel of the cylinder 10. The disk 14 is s ace'd from the perforated bottoin'5'0f the. v

tan lr 4 and such space constitutes a chamber 9 in which may be coal or other granu ar filtering agent.

From the foregoingdescription it is obvious that when blocks ,of ice are placed .in the tank 4 asl they melt the liquid will pass through theperforated bottom 5 and the-EL.

placed sand, gravel',char-1A 'y tering disk 14 inte the bottom of the rece tacle 1 and the water- .thus filteredmay e drawn off through the faucet 2. The object .of making the bottom 5 concaved is that the ice will, by gravity, center itself upon the said bottom and consequently there will always be some uncovered perforatios through which the Water may percolate-into the chamber 9. Also, the concaved formation of the bottom of the tank 4 adds rigidity to the bottem and prevents any tendency of the sides of the tank 4 to spring so that theA l threads 8 and 11 may not pro erly engage. Also,` the concavity of the sai bottom retains the contents of the chamber 9 withV a; concaved up er surface so that a maximum filtering `su 'ace is presented to theliquid. The gasket 1,2 completely closes the space between the upper endof the cylinder 1() and the flange 7. Consequently, there can be no tendency for the liquid to flow up through the threads 8 and 11 instead of down through Consequently, the said thread `will be ke t free of grit and' will not lie-subjected to t e wear incidental to the presence of such foreign matter.

Having described the invention what vis claimed is A filter for use in connection with afwater cooler and com rising. a cylindrical waterrel sceptacle ofu orm diameter and havinan 'integralv downwardly dished foraminoual jton1, an'outwardly flanged upper portion-im.

Ategral.with said receptacle for bearinggupon ed,l a co1 the Walls of the 'eoo1er, 'the lower portion of said receitaole being exteriorly screw threadsaid cylinder upon the receptacle being' limited b the collar, Said cylinder having an ili-` turne flan eat its lower end, and' a, one piece filtering insertiblginto the cylinder 'and ar integral' with the receptacle and seated u ori the flange., the entire upper sur- `fece er1 that portion of the lower surface Within the Wall of the ange being freely ex `posed for filtering purposes.

. ln testimozoy` that we claim the foregoing as our own, Weihave hereto aiXed our agnetures inthe presence of two witnesses.

JEROME G. HElTZMAN.

OTTO B.?HEITZMAN.

"Witnesses: v

CEAS. D. DIEDimJH7` AfW GRIGGS. 

